mirror of
https://github.com/prometheus-operator/prometheus-operator.git
synced 2025-04-16 09:16:38 +00:00
125 lines
3.6 KiB
Go
125 lines
3.6 KiB
Go
// Copyright 2018 The prometheus-operator Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"flag"
|
|
"io/ioutil"
|
|
"log"
|
|
"os"
|
|
"path"
|
|
"path/filepath"
|
|
|
|
monitoring "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring"
|
|
monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
|
|
|
|
"k8s.io/api/core/v1"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
k8sYAML "k8s.io/apimachinery/pkg/util/yaml"
|
|
|
|
"github.com/ghodss/yaml"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
func main() {
|
|
var ruleConfigMapName = flag.String("rule-config-map", "", "path to rule ConfigMap")
|
|
var ruleCRDSDestination = flag.String("rule-crds-destination", "", "destination new crds should be created in")
|
|
flag.Parse()
|
|
|
|
if *ruleConfigMapName == "" {
|
|
log.Print("please specify 'rule-config-map' flag")
|
|
flag.PrintDefaults()
|
|
os.Exit(1)
|
|
}
|
|
|
|
if *ruleCRDSDestination == "" {
|
|
log.Print("please specify 'rule-crds-destination' flag")
|
|
flag.PrintDefaults()
|
|
os.Exit(1)
|
|
}
|
|
|
|
destPath, err := filepath.Abs(*ruleCRDSDestination)
|
|
if err != nil {
|
|
log.Fatalf("failed to get absolut path of '%v': %v", ruleCRDSDestination, err.Error())
|
|
}
|
|
ruleCRDSDestination = &destPath
|
|
|
|
file, err := os.Open(*ruleConfigMapName)
|
|
if err != nil {
|
|
log.Fatalf("failed to read file '%v': %v", ruleConfigMapName, err.Error())
|
|
}
|
|
|
|
configMap := v1.ConfigMap{}
|
|
|
|
err = k8sYAML.NewYAMLOrJSONDecoder(file, 100).Decode(&configMap)
|
|
if err != nil {
|
|
log.Fatalf("failed to decode manifest: %v", err.Error())
|
|
}
|
|
|
|
ruleFiles, err := CMToRule(&configMap)
|
|
if err != nil {
|
|
log.Fatalf("failed to transform ConfigMap to rule file crds: %v", err.Error())
|
|
}
|
|
|
|
for _, ruleFile := range ruleFiles {
|
|
encodedRuleFile, err := yaml.Marshal(ruleFile)
|
|
if err != nil {
|
|
log.Fatalf("failed to encode ruleFile '%v': %v", ruleFile.Name, err.Error())
|
|
}
|
|
|
|
err = ioutil.WriteFile(path.Join(*ruleCRDSDestination, ruleFile.Name), encodedRuleFile, 0644)
|
|
if err != nil {
|
|
log.Fatalf("failed to write yaml manifest for rule file '%v': %v", ruleFile.Name, err.Error())
|
|
}
|
|
}
|
|
}
|
|
|
|
// CMToRule takes a rule ConfigMap and transforms it to possibly multiple
|
|
// rule file crds. It is used in `cmd/po-rule-cm-to-rule-file-crds`. Thereby it
|
|
// needs to be public.
|
|
func CMToRule(cm *v1.ConfigMap) ([]monitoringv1.PrometheusRule, error) {
|
|
rules := []monitoringv1.PrometheusRule{}
|
|
|
|
for name, content := range cm.Data {
|
|
ruleSpec := monitoringv1.PrometheusRuleSpec{}
|
|
|
|
if err := k8sYAML.NewYAMLOrJSONDecoder(bytes.NewBufferString(content), 1000).Decode(&ruleSpec); err != nil {
|
|
return []monitoringv1.PrometheusRule{}, errors.Wrapf(
|
|
err,
|
|
"unmarshal rules file %v in configmap '%v' in namespace '%v'",
|
|
name, cm.Name, cm.Namespace,
|
|
)
|
|
}
|
|
|
|
rule := monitoringv1.PrometheusRule{
|
|
TypeMeta: metav1.TypeMeta{
|
|
Kind: monitoringv1.PrometheusRuleKind,
|
|
APIVersion: monitoring.GroupName + "/" + monitoringv1.Version,
|
|
},
|
|
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: cm.Name + "-" + name,
|
|
Namespace: cm.Namespace,
|
|
Labels: cm.Labels,
|
|
},
|
|
Spec: ruleSpec,
|
|
}
|
|
|
|
rules = append(rules, rule)
|
|
}
|
|
|
|
return rules, nil
|
|
}
|